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Why do I get AttributeError: 'NoneType' object has no attribute 'something'?
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How do I discover memory usage of my application in Android?
...system to this point.
Going lower-level, you can use the Debug API to get raw kernel-level information about memory usage: android.os.Debug.MemoryInfo
Note starting with 2.0 there is also an API, ActivityManager.getProcessMemoryInfo, to get this information about another process: ActivityManager.g...
How can I resize an image using Java?
...ha) {
g.setComposite(AlphaComposite.Src);
}
g.drawImage(originalImage, 0, 0, scaledWidth, scaledHeight, null);
g.dispose();
return scaledBI;
}
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Grep and Sed Equivalent for XML Command Line Processing
... @SteveBennett indeed it doesn't, but the features it adds on top of raw XPath are good enough to make it competitive with "grep and sed". If you want the fancy, fancy goodness of XQuery... well, that's more like an XML equivalent to perl or awk. :)
– Charles Duffy
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What is the difference between Swing and AWT?
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Because Swing tries to do everything possible in Java other than the very raw graphics routines provided by a native GUI window, it used to incur quite a performance penalty compared to AWT. This made Swing unfortunately slow to catch on. However, this has shrunk dramatically over the last several ...
How to configure MongoDB Java driver MongoOptions for production use?
...(WriteConcern.MAJORITY). Typicall you should set this to 1 unless you need raw performance (-1 or 0) or replicated writes (>1). Values higher than 1 have a considerable impact on write throughput.
fsync. Durability option that forces mongo to flush to disk after each write when enabled. I've neve...
java.net.SocketException: Connection reset
...s like this, I usually sit down with a tool like WireShark and look at the raw data being passed back and forth. You might be surprised where things are being disconnected, and you are only being notified when you try and read.
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Create instance of generic type in Java?
...()[0] is returning a ParameterizedType. If it is, then you want to get the raw type, and create an instance of that instead.
– crush
Aug 20 '14 at 15:42
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How to step through Python code to help debug issues?
...llow it: https://github.com/gotcha/ipdb/pull/155
Or alternatively, as in raw pdb 3.2+ you can set some breakpoints from the command line:
ipdb3 -c 'b 12' -c 'b myfunc' ~/test/a.py
although -c c is broken for some reason: https://github.com/gotcha/ipdb/issues/156
python -m module debugging has ...
C++ Object Instantiation
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Raw pointers are useful when you want auto_ptr-like semantics (transferring ownership), but retain the non-throwing swap operation, and don't want the overhead of reference counting. Edge case maybe, but useful.
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